Multiple choice

Which of the following statements regarding Kreb's cycle is wrong?

  1. Attachment of acetyl CoA to oxaloacetic acid starts the TCA cycle.

  2. Three molecules of NADH are produced per molecule of glucose.

  3. As the TCA ends, it regenerates four-carbon oxaloacetic acid.

  4. During TCA cycle, QH2 is also formed.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Most of the energy made feasible by the oxidative steps of the TCA is converted as energy-rich electrons to NAD+, producing NADH. For each acetyl group that enters the TCA cycle, three molecules of NADH are produced.

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